Apparatus for refining camphor



(No Model.)

Wl v. -MGKBNZIB APPARATUS POR RBFINING OAMPHOR.

No. 424,615. Patented Apr. 1,1890.

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VILLIAM V. MCKENZIE, OF RAHVAY, NEV JERSEY.

APPARATUS FOR REFINING CANIPHOR.

SPECIFICATION forming part of Letters Patent No. 424,615, dated April 1, 1890.

Application filed August 24, 1889. Serial No. 321,876. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM V. MCKENZE, acitizen of the United States, residing at Rahway, in the county of Union and State of New Jersey, have invented a certain new and useful Improvement in Refining Apparatus or Furnaces for Camphor or other Similar Substances, of which the following is a specification.

rlhe invention consists in the construction and novel arrangement of parts, hereinafter set forth.

In the drawings, Figure 1 is afront view of the furnace embodying my invention. Fig. 2 is a vertical section on the line o: @c of Fig. 3, and Fign 3 is a top view with the refiningpan removed.

Similar letters of reference indicate like parts in all the figures of the drawings.

Referring by letter to the drawings, A designates the furnace, which is here shown as rectangular in form and consisting of the metal bottom a, the outer metal side Walls a', and the inner. metal side walls a2. The walls a a2 form a double wall all around the furnace, and in order to better retain heat within the furnace a packing B is placed between the walls. For this packing I prefer to use asbestus, and a thick layer of asbestus B is spread upon the inner surface of the bottom d.

The furnace may be supported upon legs b, and it is provided at one side with a hinged door o', having a mica panel b2.

I find gas a suitable means for supplying heat to the furnace, and therefore extend tubes C from the supplypipes c through openings c in the bottom of the furnace into the space between the bottom of the furnace upward, as at 67,2.

and the refining-pan, and openings c2 in the side walls provide'a suitable draft. I have here shown five openings o for gashtubes but it is obvious that a greater or less number may be provided.

D designates the refining-pan, of suitable metal, placed within and extending nearly to the bottom of the furnace. rlhe side walls d of the pan converge downward, so that the heat from the gas-burners will be distributed on all parts of the pan. The upper edges of the walls d are flanged outward, as at d', and The portions d rest upon the upper edges of the furnace-wall a2, which is extended above the wall of, and the upturned portion dg of the flange serves to rea tain a packing, as hereinafter set forth.

E is a cover for the pan. This cover rests upon the portion d of the fiange and has its edge slightly turned up to retain the clay or other packing cl3, as plainly shown in Fig. 2. The coverE has an openin g e through it, which may be closed by a pivoted or sliding cover or valve e.

the pan should be air-tight. Therefore a suit;

around the edges of the cover e', as well as around the edges of the cover E, and as a further means of holding the cover E against the pressure exerted within the pan I employ clampingscrews c2 in the manner shown in Fig. 2.

In refining camphor in my apparatus the crude material is placed within the pan and the cover is clamped and sealed in place, as heretofore described, and when the crude camphor is subjected to sufcient heat the refined portion'adheres to the inner surface of the cover E, from which it may be scraped when the refining shall have been completed. Before the cover E is removed for the purpose of scraping the camphor therefrom the cover e should be opened to allow the escape of gases and harden the camphor in the cover E.

I have here shown a single refining-furnace; but in practice a series of furnaces may advantageously be employed.

Having described my invention, what.n I claim is@ l. In a refining apparatus, the combination, with a heat-supply, of a furnace comprising double side walls, asbestus between said walls, and a bottom having a layer of asbestus 'and provided with openings for tubes, and a refining-pan extended into the furnace and provided with a cover having a valve to allow the escape of gas when the refining is completed, substantially as specified.

2. ,In a refining apparatus, the combination, with a heatsupply and a furnace substantially such as described, of a rening-pan having downwardlyconverging side walls and outwardly and upwardly turn ed fia-nge, a cover resting on said flange and having an opening through it, a cover for said. opening, and a Vhen in use for refining, it is necessary that able packingsuch as clay-*may be placed packing and holding device for said cover, substantially as specified.

3. In a refining apparatus, the combination of a furnace having an opening or openings in its bottom, a refining-pan extending into said furnace nearly to its bottom, and tubes for a heat-supply extending through the opening or openings into the space between the bottom of the furnace and the pan, substan- Io tially as specified.

4L. In a refining apparatus, the combination,

with a heat-supply and a furnace substantially such as described, of a refining-pan having au outwardly and upwardly turned ange, a cover resting on said flange and having a valve in its top, and a packing and holding device for said cover, Substantially as specilied.

WILLIAM 'V. MCKENZIE. Witnesses:

S. O. EDMONDS, WM. M. lLIFF. 

